I'm 41 and still haven't told my parents. I think my mom would be extremely uncomfortable and my dad would say its **. My husband (and kids)support me 100% and love to hear my stories. When he sees a spaced out look on my face he waits then asks what happened.
I think the nonbelievers just never had experiences themselves or they're too scared to even think about it. I had one friend in high school that would close her ears and walk away if anyone even mentioned a ghost because her mom said it was "evil talk."